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Finding the Fourth Proportional to 624.26, 866.06 and 618.86

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Solution

The fourth proportional to 624.26, 866.06 and 618.86 is: 858.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.26 : 866.06 = 618.86 : x
  2. Step 2: Convert to fraction form
    624.26/866.06 = 618.86/x
  3. Step 3: Cross multiply
    624.26x = 866.06 × 618.86
  4. Step 4: Simplify right side
    624.26x = 535,969.89
  5. Step 5: Solve for x
    x = 535,969.89/624.26
  6. Step 6: Final answer
    x = 858.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.